Spectrally Selective Full-Color Single-Component Organic Photodetectors Based on Donor-Acceptor Conjugated Molecules

Abstract

Photodetectors based on organic materials are attractive due to their tunable spectral response and biocompatibility, meaning that they are a promising platform for an artificial human eye. To mimic the photoelectric response of the human eye, narrowband spectrally-selective organic photodetectors are in great demand, and single-component organic photodetectors based on donor-acceptor conjugated molecules are a noteworthy candidate. In this work, we present single-component selective full-color organic photodetectors based on donor-acceptor conjugated molecules synthetized to mimic the spectral response of the cones and rods of a human eye. The photodetectors demonstrated a high responsivity (up to 70 mA/W) with a response time of less than 1 µs, which is three orders of magnitude faster than that of human eye photoreceptors. Our results demonstrate the possibility of the creation of an artificial eye or photoactive eye “prostheses”.

The State‐of‐the‐Art Solution‐Processed Single Component Organic Photodetectors Achieved by Strong Quenching of Intermolecular Emissive State and High Quadrupole Moment in Non‐Fullerene Acceptors

“…Based on the D* calculation, our devices (especially Y6 OPD) show the state-of-the-art device performance among solution-processed single-component OPD reports. [41,42] Further, to assess the device performance of particularly Y6 and IT-4F devices, we compared our results with other reports based on state-of-the-art BHJ and PHJ OPDs (Table S2, Supporting Information). Even without incorporating donor materials, singlecomponent Y6 and IT-4F devices showed comparably excellent OPD performance-sufficiently low J d (≈10 −9 A cm −2 ) and high R (>0.15 A W −1 ) and D* (>10 12 Jones), indicating great potential of NFAs as single-component systems for OPD applications.…”

Nanoparticles of Push–Pull Triphenylamine-Based Molecules for Light-Controlled Stimulation of Neuronal Activity

“…Push–pull conjugated small molecules are one of the most promising classes of organic semiconducting materials. Varying different structural parameters, such as the type of electron donor and electron acceptor units or their quantity and sequence within the molecule, allows fine-tuning both the spectral and other set of properties. − Push–pull chromophores have been widely used in biological and medical applications for the modulation of NO-mediated diseases, PDT, − and bioimaging. , One of the most promising electron donor blocks is triphenylamine, ,,, which has been used to obtain biocompatible organic materials. − Recently, we reported on push–pull molecules based on triphenylamine with both photovoltage and photocurrent photoresponses in biological electrolyte solution comparable to those of the human eye cones and rods. , …”

“…42−44 Recently, we reported on push−pull molecules based on triphenylamine with both photovoltage and photocurrent photoresponses in biological electrolyte solution comparable to those of the human eye cones and rods. 25,45 In this work, the synthesis of push−pull triphenylaminecontaining star-shaped molecules with dicyanovinyl acceptor groups having terminal alkyl chains of different lengths (C1, C6, C10, C12) and their investigation as artificial light nanoactuators of neuronal activity are reported (Figure 1). The treatment of rat cortical neurons with NPs based on C1−C12 molecules caused depolarization of cell membranes upon light irradiation.…”